We have a pair of Egyptian geese that are about three years old. The goose has not yet lay any eggs. They have been together in a pen by themselves, and have been very tolerant of each other until several days ago. Now the gander has begun bullying the goose. He chases her around the pen and nudges at her. He only seems content when she is jammed into a corner of a nesting box, and then he lays next to her. The only change in their routine is that we have had a lot of snow recently and the birds have all spent more time cooped up. Does this sound like anything to be concerned about? Thanks for your help!